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Wyświetlanie 1-10 z 11
Tytuł:
Dynamics of laser-induced melting and modification of the surface of semiconductors by nanosecond laser pulses
Autorzy:
Gnatyuk, V.
Aoki, T.
Vlasenko, O.
Gorodnychenko, O.
Tematy:
semiconductors
laser irradiation
time-resolved reflectivity
melting threshold
Pokaż więcej
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Powiązania:
https://bibliotekanauki.pl/articles/384325.pdf  Link otwiera się w nowym oknie
Opis:
In situ detection and dynamics of laser-induced melting in different semiconductor crystals (CdTe, CdHgTe, GaAs, InSb and SiC) were performed by the time-resolved reflectivity (TRR). The samples were subjected to irradiation with 20 ns pulses of KrF excimer or ruby laser with energy density varied in a wide range. The surface morphology of the crystals was monitored using optical microscopy and time dependences of the temperature of the crystal surface as a function of laser pulse energy density was also calculated. The melting and ablation threshold values were determined and specific features of the laser-induced phase transitions in the surface region of the semiconductors were analyzed.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
High speed signal processing for photon counting X-ray detection
Autorzy:
Shinomiya, B.
Koike, A.
Morii, H.
Okunoyama, T.
Neo, Y.
Mimura, H.
Aoki, T.
Tematy:
X-ray
CdTe
photon counting
Pokaż więcej
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Powiązania:
https://bibliotekanauki.pl/articles/385292.pdf  Link otwiera się w nowym oknie
Opis:
Recently practical X-ray measurement systems are demanded energy distinction function. Photon-counting CdTe semiconductor detectors have a high energy resolution in a low count rate condition at room temperature. However, the energy resolution is decreased by pile-up phenomenon in a high count rate condition. In conventional signal processing, processing time estimated X-ray photon energy from the pulse waveform is about tens of microseconds. This time is depended on the pulse decay time. This paper purposes to maintain the high energy resolution by changing the signal-processing algorithm, which derived the pulse rise height of the output waveform from the CdTe detector in a high count rate condition. As a result, the pulse rise time required to estimate the pulse rise height was short about 100 ns at incident X-ray energy 60 keV. As the result of energy spectrum by using this data, the FWHM of about 11keV (at 60 keV) when the count rate of 500 kcps. This result shows the possibility that the photon counting sensor has application for the high count rate imaging without decrease of the high energy resolution.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Growth and application of ultra-long multi-walled carbon nanotube
Autorzy:
Shimizu, S.
Okada, M.
Inoue, Y.
Neo, Y.
Kume, H.
Aoki, T.
Mimura, H.
Tematy:
CNT
CVD
yarn
FeCl2
Pokaż więcej
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Powiązania:
https://bibliotekanauki.pl/articles/385267.pdf  Link otwiera się w nowym oknie
Opis:
We found the easy and efficient synthesis method of the vertically aligned ultralong multi-walled nanotubes using iron chloride powder. The 2.1-mm-long bulk nanotubes can be grown by conventional thermal chemical vapor deposition on bare quartz surface with the single gas flow of acetylene for 20 min. In addition to the high growth rate, the bulk of carbon nanotubes is easily spun into the yarn by pulling it out, and the present method also provides the coating ability with nanotubes as a new functionality of this nanomaterial. Š 2008 American Institute of Physics.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Introduction of three-dimensional measurement technologies developed and applied in suzuki motor corporation
Autorzy:
Yamage, Y.
Aoki, T.
Hashimoto, T.
Rövid, A.
Shibahara, T.
Akatsuka, S.
Suzuki, H.
Takeshi, M.
Ono, M.
Tematy:
image measurement
3D measurement
Direct
Linear Transformation (DLT) methods
Phase-Only Correlation
(POC) function
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Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Powiązania:
https://bibliotekanauki.pl/articles/385092.pdf  Link otwiera się w nowym oknie
Opis:
Suzuki Motor Corporation (SMC) recognizes the importance of collaborative projects with Universities and how it contributes to technological development effectively. In spite of the world economical depression, several projects could get started this year leaded by SMC. As a researcher of SMC, Author takes charge of two collaborative projects and introduces these as typical examples of the most successful collaborations. The first is, "3D Measurement System for Crash Tested Car" at Shizuoka University (Japan) and Budapest Tech Polytechnical Institute (Hungary) from 2008; the second is, "High-Accuracy Stereo Vision System Based on Phase-Only Correlation (POC) and Its Application to metal Component Inspection" with Tohoku Univ. (Japan) 2003-2005. By these collaborations, the profound knowledge of universities has a lot of possibility to suits the technical needs of SMC.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Quintet-gated FEA to form crossover beam
Autorzy:
Tagami, T.
Takeda, M.
Horie, S.
Yoshida, T.
Nagao, M.
Neo, Y.
Aoki, T.
Mimura, H.
Kanemaru, S.
Tematy:
FEA
beam
Pokaż więcej
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Powiązania:
https://bibliotekanauki.pl/articles/385271.pdf  Link otwiera się w nowym oknie
Opis:
In this report, we have described about new field emission array (FEA) structure built-in micro-column. This newly proposed FEA has multi-gated structured and is designed to form a crossover. We had already demonstrated the quad- and quintet- gated FEA. A crossover formation by was successfully observed for the first time. by the quintetgated FEA Furthermore electron beam lithography was demonstrated.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Coarse Aggregate Recycling by Pulsed Discharge Inside of Concrete
Autorzy:
Inoue, S.
Araki, J.
Aoki, T.
Maeda, S.
Iizasa, S.
Takaki, M.
Wang, D.
Namihira, T.
Shigeishi, M.
Ohtsu, M.
Akiyama, H.
Tematy:
52.80.Wq
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:
https://bibliotekanauki.pl/articles/1807935.pdf  Link otwiera się w nowym oknie
Opis:
In Japan, the treatment of waste concrete scraps has been one of the environmental issues. Therefore, new application using pulsed power discharge has been developed as the recycling method of the coarse aggregates from the waste concrete scraps. In the work, the dependences of the quality of the recycled coarse aggregate by the repetitive pulsed discharge treatments on the consumption energy were investigated. As the results, it was clear that the quality of the recycled coarse aggregate could be controlled by the number of discharge treatments. The recycled coarse aggregate, which satisfied class H under the regulations of Japan Industrial Standard (JIS A5005 and JIS A5021), was produced with the smallest consumption energy when the discharged energy from 0.02 μF of capacitor charged up to 400 kV applied to the waste concrete scraps during single discharge treatment.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis and evaluation of novel mri contrast agents of chemically modified GD-DTPA complexes with sugars
Autorzy:
Sugiyama, M.
Yamashita, M.
Yu, G.
Fujie, M.
Ogawa, K.
Ozaki, N.
Aoki, T.
Mizuno, S.
Okada, S.
Tachi, K.
Aoshima, K.
Sankar, U. R.
Kumar, B. S.
Takehara, Y.
Sakahara, H.
Tematy:
MRI contrast agent
Gd(III)-DTPA
tumor imaging
Pokaż więcej
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Powiązania:
https://bibliotekanauki.pl/articles/385252.pdf  Link otwiera się w nowym oknie
Opis:
MRI is one of medical diagnostic imaging technologies that can draw the cross section in the body. To obtain a clearer image, Gd complexes are often used as MRI contrast agents. Gd-DTPA (Gd-Diethylenetriaminepentaacetate, Magnevist registered trademark ) is used in particular as the MRI contrast agents. We prepared and evaluated novel MRI contrast agents that were chemically modified Gd-DTPA with sugars (represented as Gd-DTPA-Sugar) via hydrolysis route for providing specificity to target organs and tissues. Gd-DTPASugar complex showed an excellent potential for the MRI contrast agent (r1=31.2 s-1mM-1). Gd-DTPA-Sugar complexes alternatively prepared by shorter synthetic route without protection/ deprotection (hydrolysis) method showed inferior results (r1=6.3 and 8.1 s-1mM-1) to the hydlized product.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
R&D of novel medicinal materials for curing cancer: sugar modified Gd-DTPA MRI contrast agents and phospha sugar anti-cancer agents
Autorzy:
Yamashita, Y.
Yamashita, M.
Fujie, M.
Suyama, K. A. T.
Ito, S.
Reddy, V. K.
Yamada, M.
Ogawa, K.
Ozaki, N.
Nakamura, S.
Aoki, T.
Yu, G.
Aoshima, K.
Kato, T.
Kamikage, N.
Kiyofuji, K.
Takehara, Y.
Sakahara, H.
Takayanagi, H.
Oshikawa, T.
Laurent, S.
Burtea, C.
Van der Elst, L.
Muller, R. N.
Tematy:
MRI contrast agent
sugar-ball-dendrimer
Gd (III)-DTPA complex
phospha sugars
phospholanes
anticancer agent
tumor
Pokaż więcej
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Powiązania:
https://bibliotekanauki.pl/articles/385218.pdf  Link otwiera się w nowym oknie
Opis:
Novel Sugar Dendritic Gd-DTPA Complexes for MRI Contrast Agents were prepared and evaluated by in vitro and in vivo methods. The sugar dendritic MRI contrast agents have a good blood vesse pool character, and draw blood vessels and liver cancer remarkably clearer than the clinically using Gd-DTPA. Phospha sugar derivatives or phosphorus heterocyclic derivatives provided by functional groups such as epoxide, bromide, etc., were prepared and evaluated by MTT in vitro method. These phospha sugar derivatives showed excellent activities against leukemia cells as well as solid cancer cells in fashions of (i) higher activity, (ii) wider spectra, (iii) higher selectivity and specificity distingushing healthy and cancer cells, etc., compared with the molecular targeting chemotheraputic anti-cancer agent, Gleevec.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Magnon and Soliton Excitations in the Carrier-Poor, One-Dimensional S=1/2 Antiferromagnet Yb$\text{}_{4}$As$\text{}_{3}$
Autorzy:
Steglich, F.
Köppen, M.
Gegenwart, P.
Cichorek, T.
Wand, B.
Lang, M.
Thalmeier, P.
Schmidt, B.
Aoki, H.
Ochiai, A.
Tematy:
75.30.Mb
65.50.+m
65.70.+y
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:
https://bibliotekanauki.pl/articles/2011226.pdf  Link otwiera się w nowym oknie
Opis:
The semimetallic quasi-one-dimensional S=1/2 Heisenberg antiferromagnet Yb$\text{}_{4}$As$\text{}_{3}$ was studied by low-temperature measurements of the specific heat C(T,B), thermal expansion α(T,B), and thermal conductivity ĸ(T,B). At finite magnetic fields (B≤12 T) we observed the following distinct anomalies: (1) the magnon contribution to C(T,0), γ T, with large coefficient γ ≈ 200 mJ/(K$\text{}^{2}$mol), becomes strongly reduced with field, and (2) a broad hump in C(T,B=const) is induced at slightly higher temperatures. (3) The latter corresponds to a pronounced peak in α(T,B=const) as well as (4) to a broad minimum in ĸ(T,B= const)/ĸ(T,0). These anomalies are well described by the classical sine-Gordon solution of a one-dimensional Heisenberg antiferromagnet with a weak easy-plane anisotropy. However, the soliton-rest energy deduced from the experimental results depends on the magnetic field like E$\text{}_{S}$ ~ B$\text{}^{ν}$, with an exponent ν ≈ 0.66, while the classical sine-Gordon model requires ν=1. Thus, our results suggest an alternative description of soliton excitations in an antiferromagnetic S=1/2 Heisenberg chain in terms of the quantum sine-Gordon model, for which an exponent ν=2/3 is appropriate.
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-10 z 11

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